METHOD, EQUIPMENT AND SYSTEM FOR ELIMINATING DSL CROSSTALK

Description

Field of the Invention

[0001] The present invention relates to network communications, and in particular, to a method, equipment and system for eliminating DSL crosstalk.

Background of the Invention

[0002] A digital subscriber line (DSL) is a data transmission technology using telephone twisted pairs as transmission medium. xDSL is a combination of the DSL technology, which includes a high-speed digital subscriber line (HDSL), a single-pair high-speed digital subscriber line (SHDSL), and an asymmetrical digital subscriber line (ADSL), and the like. The SHDSL is based on baseband transmission. Other xDSLs are based on passband transmission, uses the frequency-division multiplexing technology, and may coexist with a plain old telephone service (POTS) in the same twisted pairs.

[0003] With higher frequency bands used by the xDSL based on passband transmission, the crosstalk at high frequency band has become a severe problem. FIG. 1 shows a method for solving the crosstalk problem between xDSLs by using a vectored digital subscriber line (vectored-DSL) technology in the conventional art. In the downlink direction, x indicates N×1 signal vectors sent by a coordinated transceiver device (may be a digital subscriber line access multiplexer (DSLAM)); y indicates signal vectors received by N×1 opposite devices (may be a subscriber-side device); and n indicates N×1 noise vectors. A shared channel is expressed by a channel transmission matrix as follow:

[0004] h_ij = (1 ≤ i ≤ N,1 ≤ j ≤ N) indicates a crosstalk transfer function of pair j to pair i; h_ij = (1 ≤ i ≤ N) indicates the channel transfer function of pair i; and N indicates the number of pairs, i.e., the number of subscribers. If a vector pre-encoder (represented by W) is introduced in the coordinated transceiver device, the signal vectors received by the opposite device receive are calculated by the following formula:

[0005] If the vector pre-encoder can make HW a diagonal matrix, for example, diag (H), the crosstalk may be eliminated.

[0006] Supposing N-1 opposite devices are already online and enter a good crosstalk elimination state, the vector pre-encoder of the coordinated transceiver device may be represented as follows:

[0007] If a first-order filter structure is used, all the diagonal elements are 1. When the N^th opposite device goes online, two steps need to be performed: activating a line and joining a vector group. Before these two steps are performed, the N^th opposite device may generate crosstalk on N-1 online opposite devices, and even cause devices to go offline. Thus, when the N^th opposite device goes online, it should not bring about crosstalk that exceeds the tolerance level of N-1 opposite devices. In addition, the process of going online should be as short as possible. In this case, the vector pre-encoder is as follows:

[0008] Compared with W_N-₁, W_N is added with a row and a column of vectors. The added column of vectors is used to eliminate the crosstalk of the N^th opposite device on N-1 online opposite devices. Thus, to reduce the crosstalk of the N^th opposite device on N-1 online opposite devices quickly, the vectors in the column of N-1 dimensions should be calculated in a short time. In the conventional art, the opposite device needs to transmit a large amount of data back to the coordinated transceiver device. However, the capacity of the feedback channel from the opposite device to the coordinated transceiver device is limited, which prolongs the time required for calculating the vectors in the new added column.

[0009] WO2006/129141 discloses a precoder which mitigates or removes interference signals (especially crosstalk) among multiple users with interconnected transmitters in vectored DSL systems and the like. According to the disclosure of Document WO2006/129141 efficient implementation is provided of the R matrix in RQ factorization that characterizes multi-user downstream vector channels (such as DMT VDSL one-sided or two-sided transmission channels). A set of precoder coefficients can vary with each tone used by each user and depend upon the encoding order of users selected for each tone. In adaptive operation, the coefficients of the R and Q matrices can be updated when changes occur to the transmission environment. Variable modulo arithmetic mitigates the power-enhancement problem, and the base of the modular arithmetic also can vary with each user within a single tone.

[0010] CN 1863099 discloses a multi user communication wire disturbing testing method and device that carries preset orthotropic spread spectrum to the send end on each line, taking cross talk testing to xDSL line according to the received signal vector at receiving end to effectively recognize the cross talk resource, cross talk extent and phase. The disclosure of the document CN 1863099 also realizes the measuring for cross talk value between the lines, and supplies basic data for dynamic frequency spectrum managing and DSLAM system optimizing.

[0011] Both of these documents fail to provide an effective solution for solving the technical problem mentioned above. It is, therefore, needed to provide a method for eliminating crosstalk between DSLs that can overcome the above-described deficiencies, and a corresponding DSL device and DSL system are also needed.

Summary of the Invention

[0012] According to the present invention a method, device and system are provided for eliminating the crosstalk between digital subscriber lines (DSLs) that a new online opposite device generates on an existing online opposite device.

[0013] As a first aspect of the invention the method for eliminating the crosstalk between DSLs includes: notifying, by a coordinated transceiver device, an existing online opposite device of a signal sent to a new online opposite device; receiving, by the coordinated transceiver device, a calculation result that is obtained by the existing online opposite device through calculation based on a detected error signal and the signal sent to the new online opposite device; and updating, by the coordinated transceiver device, a coefficient of a vector pre-encoder based on the calculation result.

[0014] In the above method, the process of notifying the existing online opposite device of the signal sent to the new online opposite device may include: sending, by the coordinated transceiver device, an initial value of a sequence generator that is used to generate the signal and time when the signal is sent, to the existing online opposite device, wherein sequence generators with the same structure are respectively configured in the coordinated transceiver device and the existing online opposite device; and obtaining, by the existing online opposite device, the signal according to the configured sequence generator, the initial value of the sequence generator, and the time when the signal is sent. Alternatively, the process may also include: sending, by the coordinated transceiver device, an ID of a signal sequence that is used to generate the signal and time when the signal is sent, to the existing online opposite device, wherein a certain number of same signal sequences are respectively pre-stored in the coordinated transceiver device and the existing online opposite device; and obtaining, by the existing online opposite device, the signal according to the stored signal sequences, the ID of the signal sequence, and the time when the signal is sent.

[0015] As a second aspect of the invention the DSL coordinated transceiver device includes: a notifying unit, adapted to notify an existing online opposite device of a signal sent to a new online opposite device; a receiving unit, adapted to receive a calculation result fed back by the existing online opposite device, where the calculation result is obtained by the existing online opposite device through calculation based on a detected error signal and the signal sent to the new online opposite device; and an updating unit, adapted to update a coefficient of a vector pre-encoder according to the calculation result. In the above DSL coordinated transceiver device, the notifying unit may includes: a storing unit adapted to store a sequence generator or a certain number of signal sequences; and a sequence sending unit adapted to: send the initial value of the sequence generator that generates the signal sent to the new online opposite device and the time when the signal is sent, to the existing online opposite device upon the condition that a sequence generator is stored in the storing unit; or send the ID of the signal sequence that generates the signal sent to the new online opposite device and the time when the signal is sent, to the existing online opposite device upon the condition that a certain number of signal sequences are stored in the storing unit.

[0016] As a third aspect of the invention the system for eliminating the crosstalk between DSLs includes an opposite device and a coordinated transceiver device, where the opposite device includes: an obtaining unit, adapted to obtain a signal that the coordinated transceiver device sends to a new online opposite device; a detecting unit, adapted to detect an error signal; a calculating unit, adapted to perform calculation based on the detected error signal and the obtained signal sent to the new online opposite device; and a feedback unit, adapted to feed back the calculation result of the calculating unit to the coordinated transceiver device; and the coordinated transceiver device of the system can be configured as the DSL coordinated transceiver device as described above.

[0017] As seen from the preceding technical solution, the present invention provides a method, a device and a system for eliminating the crosstalk between DSLs. The opposite device performs the calculation, which greatly reduces the amount of data transmitted back to the coordinated transceiver device. Thus, the duration of crosstalk that the new online opposite device generates on the existing online opposite device may be greatly reduced, and the new opposite device may join the vector group faster.

Brief Description of the Drawings

[0018] FIG. 1 shows a method for solving crosstalk between xDSLs by using a vectored-DSL technology in the conventional art;

[0019] FIG. 2 shows a method for eliminating crosstalk between DSLs in a first embodiment of the present invention;

[0020] FIG 3 shows a system for eliminating crosstalk between DSLs in a second embodiment of the present invention;

[0021] FIG 4 shows a structure of a receiving unit of an opposite device in the system for eliminating the crosstalk between DSLs in the second embodiment of the present invention; and

[0022] FIG. 5 shows a structure of a sending unit of a coordinated transceiver device in the system for eliminating the crosstalk between DSLs in the second embodiment of the present invention.

Detailed Description of the Invention

[0023] FIG 2 shows a method for eliminating the crosstalk between DSLs in an embodiment of the present invention. The method includes the following steps:

[0024] Step 101: The coordinated transceiver device notifies an existing online opposite device of a signal sent to a new online opposite device.

[0025] The coordinated transceiver device may notify the existing online opposite device of the signal sent to the new online opposite device by respectively configuring a sequence generator with the same structure in each of the coordinated transceiver device and the opposite device. The coordinated transceiver device needs to send only the initial value of the sequence generator that is used to generate the signal sent to the new online opposite device, and the time when the signal is sent to the new online opposite device, to the existing online opposite device. In this case, when the coordinated transceiver device sends the signal generated by the sequence generator to the new online opposite device, the existing online opposite device may obtain the signal according to the sequence generator, the received initial value of the sequence generator, and the time when the signal is sent.

[0026] The coordinated transceiver device may also notify the existing online opposite device of the signal sent to the new online opposite device by respectively pre-storing a certain number of same signal sequences in the coordinated transceiver device and the opposite device. The coordinated transceiver device needs to send only the ID of the signal sequence that is used to generate the signal sent to the new online opposite device, and the time when the signal is sent to the new online opposite device, to the existing online opposite device. In this case, when the coordinated transceiver device sends the signal generated by the signal sequence to the new online opposite device, the existing online opposite device may obtain the signal according to the stored signal sequences, the received ID of the signal sequence, and the time when the signal is sent.

[0027] Step 102: The existing online opposite device performs a calculation according to a detected error signal and the obtained signal sent to the new online opposite device, and feeds back the calculation result to the coordinated transceiver device.

[0028] For the error signal detected by the existing online opposite device, a sample received by the existing online opposite device may be judged, so as to obtain a decision sample, and then the error signal may be obtained according to the difference between the received sample and the decision sample.

[0029] The existing online opposite device can perform the calculation as the following formula according to the detected error signal and the obtained signal sent to the new online opposite device:

[0030] Supposing N-1 opposite devices already go online, i (1 ≤ i ≤ (N -1)) indicates any of the N-1 online opposite devices. M indicates a certain accumulation time; X(n) indicates the signal that the coordinated transceiver device sends to the new online opposite device; X*(n) indicates the conjugation of X(n). E_i(n) indicates the error signal detected by the i^th existing online opposite device when the coordinated transceiver device sends X(n) to the new online opposite device. The existing online opposite device multiplies the conjugation of the obtained signal sent to the new online opposite device by the detected error signal, and accumulates the product for a certain time to obtain the calculation result.

[0031] The existing online opposite device can also perform the calculation by the following formula according to the detected error signal and the obtained signal sent to the new online opposite device:

[0032] µ indicates the adaptive step factor. The existing online opposite device multiplies the conjugation of the obtained signal sent to the new online opposite device by the detected error signal and the adaptive step factor, and accumulates the product for a certain time to obtain the calculation result.

[0033] The i^th existing online opposite device feeds back the calculation result r_i to the coordinated transceiver device.

[0034] Step 103: The coordinated transceiver device updates the coefficient of the vector pre-encoder according to the calculation result fed back by the existing online opposite device.

[0035] When the calculation result fed back by the existing online opposite device is calculated by the formula

, the coordinated transceiver device updates the coefficient of the vector pre-encoder according to the following formula:

[0036] W_i,N(old) indicates the old coefficient of the vector pre-encoder for eliminating the crosstalk that the N^th new online opposite device generates on the i^th existing online opposite device; W_i,N(new) indicates the updated coefficient of the vector pre-encoder for eliminating the crosstalk that the N^th new online opposite device generates on the i^th online opposite device. The coordinated transceiver device decreases the coefficient of the vector pre-encoder for eliminating the crosstalk that the new online opposite device generates on the existing online opposite device by the product of the calculation result and adaptive step factor.

[0037] When the calculation result fed back by the existing online opposite device is calculated by the formula

, the coordinated transceiver device updates the coefficient of the vector pre-encoder according to the following formula:

[0038] The coordinated transceiver device decreases the coefficient of the vector pre-encoder for eliminating the crosstalk that the new online opposite device generates on the existing online opposite device by the calculation result.

[0039] According to the method for eliminating the crosstalk between DSLs in this embodiment, the opposite device performs the calculation, which greatly reduces the amount of data transmitted back to the coordinated transceiver device. Thus, the duration of the crosstalk that the new online opposite device generates on the existing online opposite device may be reduced, and the new opposite device may join the vector group faster.

[0040] FIG. 3 shows a system for eliminating the crosstalk between DSLs in the second embodiment of the present invention. The system includes at least an opposite device 1 and a coordinated transceiver device 2.

[0041] The opposite device 1 includes an obtaining unit 11, a detecting unit 12, a calculating unit 13, and a feedback unit 14. The obtaining unit 11 is adapted to obtain the signal that the coordinated transceiver device sends to a new online opposite device; the detecting unit 12 is adapted to detect an error signal; the calculating unit 13 is adapted to perform a calculation based on the detected error signal and the obtained signal sent to the new online opposite device; and the feedback unit 14 is adapted to feed back the calculation result of the calculating unit to the coordinated transceiver device.

[0042] Correspondingly, the coordinated transceiver device 2 includes a notifying unit 21, a receiving unit 22, and an updating unit 23. The notifying unit 21 is adapted to notify an existing online opposite device of a signal sent to the new online opposite device; the receiving unit 22 is adapted to receive the calculation result fed back by the existing online opposite device; and the updating unit 23 is adapted to update the coefficient of the vector pre-encoder according to the calculation result.

[0043] FIG. 4 shows a structure of the receiving unit of the opposite device provided in this embodiment. The obtaining unit 11 of the opposite device may further include a storing unit 111, a sequence receiving unit 112, and a signal generating unit 113. The storing unit 111 is adapted to store a sequence generator or a certain number of signal sequences. The sequence receiving unit 112 is adapted to: receive the initial value of the sequence generator that is used to generate the signal sent to the new online opposite device and the time when the signal is sent, from the coordinated transceiver device when the sequence generator is stored in the storing unit; or receive the ID of the signal sequence that is used to generate the signal sent to the new online opposite device and the time when the signal is sent, from the coordinated transceiver device when a certain number of signal sequences are stored in the storing unit. The signal generating unit 113 is adapted to: generate the signal that the coordinated transceiver device sends to the new online opposite device according to the sequence generator, the initial value of the sequence generator and the time when the signal is sent when the sequence generator is stored in the storing unit; or generate the signal that the coordinated transceiver device sends to the new online opposite device according to the signal sequences, the ID of the signal sequence and the time when the signal is sent when a certain number of signal sequences are stored in the storing unit.

[0044] FIG. 5 shows a structure of the sending unit of the coordinated transceiver device provided in this embodiment. The notifying unit 21 of the coordinated transceiver device may further include a storing unit 211 and a sequence sending unit 212. The storing unit 211 is adapted to store a sequence generator or a certain number of signal sequences. The sequence sending unit 212 is adapted to: send the initial value of the sequence generator that generates the signal sent to the new online opposite device and the time when the signal is sent, to the existing online opposite device when the sequence generator is stored in the storing unit; or send the ID of the signal sequence that generates the signal sent to the new online opposite device and the time when the signal is sent, to the existing online opposite device when a certain number of signal sequences are stored in the storing unit.

[0045] According to the system and device for eliminating the crosstalk between DSLs in this embodiment, the opposite device performs the calculation, which greatly reduces the amount of data transmitted back to the coordinated transceiver device. Thus, the duration of the crosstalk that the new online opposite device generates on the existing online opposite device may be reduced, and the new opposite device may join the vector group faster.

[0046] It is understandable to those skilled in the art that all or part of steps of the preceding method provided in embodiments of the present invention may be implemented by a program that instructs related hardware, where the program may be stored in a computer-readable storage medium.

[0047] The storage medium may be a read-only memory, a magnetic disk or a compact disk.

[0048] Although the present invention has been described through some exemplary embodiments and accompanying drawings, the invention is not limited to such embodiments. It is apparent that those skilled in the art can make various modifications and variations to the invention.

Claims

1. A method for eliminating crosstalk between digital subscriber lines, DSLs, comprising:

notifying (101), by a coordinated transceiver device, an existing online opposite device of a signal sent to a new online opposite device;

receiving (102), by the coordinated transceiver device, a result of calculation that is obtained by the existing online opposite device, wherein the calculation is performed based on a detected error signal and the signal sent to the new online opposite device; and

updating (103), by the coordinated transceiver device, a coefficient of a vector pre-encoder based on the calculation result; the method b eing characterized in that the process of notifying the existing online opposite device of the signal sent to the new online opposite device by the coordinated transceiver device comprises:

sending, by the coordinated transceiver device, an initial value of a sequence generator that is used to generate the signal and time when the signal is sent, to the existing online opposite device, wherein sequence generators with the same structure are respectively configured in the coordinated transceiver device and the existing online opposite device; and

obtaining, by the existing online opposite device, the signal according to the

configured sequence generator, the initial value of the sequence generator, and the time when the signal is sent.

2. Method for eliminating crosstalk between digital subscriber lines, DSLs, comprising:

notifying (101), by a coordinated transceiver device, an existing online opposite device of a signal sent to a new online opposite device;

receiving (102), by the coordinated transceiver device, a result of calculation that is obtained by the existing online opposite device, wherein the calculation is performed based on a detected error signal and the signal sent to the new online opposite device; and

updating (103), by the coordinated transceiver device, a coefficient of a vector pre-encoder based on the calculation result; the method ;being characterized in that the process of notifying the existing online opposite device of the signal sent to the new online opposite device by the coordinated transceiver device comprises: sending, by the coordinated transceiver device, an ID of a signal sequence that is

used to generate the signal and time when the signal is sent, to the existing online opposite device, wherein a certain number of same signal sequences are respectively pre-stored in the coordinated transceiver device and the existing online opposite device; and obtaining, by the existing online opposite device, the signal according to the stored

signal sequences, the ID of the signal sequence, and the time when the signal is sent.

3. The method of claim 1 or 2, wherein the calculation based on the detected error signal and the signal sent to the new online opposite device comprises: multiplying a conjugation of the signal sent to the new online opposite device by the error signal; and accumulating the product for a certain time.

4. The method of claim 3, wherein the coefficient of the vector pre-encoder is adapted to eliminate the crosstalk that the new online opposite device generates on the existing online opposite device, and the process of updating the coefficient of the vector pre-encoder based on the calculation result by the coordinated transceiver device comprises: subtracting, by the coordinated transceiver device, a product of the calculation result and an adaptive step factor from the coefficient of the vector pre-encoder.

5. The method of claim 1 or 2, wherein the calculation based on the detected error signal and the signal sent to the new online opposite device comprises: multiplying the conjugation of the signal sent to the new online opposite device by the adaptive step factor, and accumulating the product for a certain time.

6. The method of claim 5, wherein the process of updating the coeffcient of the vector pre-encoder based on the calculation result by the coordinated transceiver device comprises: subtracting, by the coordinated transceiver device, the calculation result from the coefficient of the vector pre-encoder.

7. The method of claim 1 or 2, wherein the error signal is detected through judging, by the existing online opposite device, a received sample to obtain a decision sample, and obtaining, by the existing online opposite device, the error signal according to a difference between the received sample and the decision sample.

8. A digital subscriber line, DSL, coordinated transceiver device, comprising:

a notifying unit (21), adapted to notify an existing online opposite device of a signal sent to a new online opposite device;

a receiving unit (22), adapted to receive a calculation result fed back by the existing online opposite device, wherein the calculation result is obtained by the existing online opposite device through performing a calculation based on a detected error signal and the signal sent to the new online opposite device; and

an updating unit (23), adapted to update a coefficient of a vector pre-encoder according to the calculation result;

the DSL coordinated transceiver device being characterized in that the notifying unit (21) comprises:

a storing unit (211), adapted to store a sequence generator; and

a sequence sending unit (212), adapted to send an initial value of the sequence

generator that is used to generate the signal and time when the signal is sent, to the existing online opposite device, so as to inform the existing online opposite device to obtain the signal according to the initial value and perform the calculation.

9. A digital subscriber line, DSL, coordinated transceiver device, comprising:

a notifying unit (21), adapted to notify an existing online opposite device of a signal sent to a new online opposite device;

a receiving unit (22), adapted to receive a calculation result fed back by the existing online opposite device, wherein the calculation result is obtained by the existing online opposite device through performing a calculation based on a detected error signal and the signal sent to the new online opposite device; and an updating unit (23), adapted to update a coefficient of a vector pre-encoder according to the calculation result;

the DSL coordinated transceiver device being characterized in that the notifying unit (21) comprises:

a storing unit (211), adapted to store a certain number of signal sequences; and

a sequence sending unit (212), adapted to send an ID of a signal sequence that is used to generate the signal and time when the signal is sent, to the existing online opposite device, so as to inform the existing online opposite device to obtain the signal according to the ID and perform the calculation.

10. A system for eliminating crosstalk between digital subscriber lines, DSLs, comprising a coordinated transceiver device (2) and an opposite device (1), wherein:

the opposite device comprises: an obtaining unit (11), adapted to obtain a signal that the coordinated transceiver device sends to a new online opposite device; a detecting unit (12), adapted to detect an error signal; a calculating unit (13), adapted to perform a calculation based on the detected error signal and the obtained signal sent to the new online opposite device; and a feedback unit, (14) adapted to feed back a calculation result of the calculating unit to the coordinated transceiver device; and

the system characterized in that:

the coordinated transceiver device is a DSL coordinated transceiver device according to claim 8 or 9

11. The system of claim 10, wherein the obtaining unit of the opposite device comprises:

a storing unit (111), adapted to store a sequence generator;

a sequence receiving unit (112), adapted to receive an initial value of the sequence generator that generates the signal sent to the new online opposite device and time when the signal is sent, from the coordinated transceiver device; and

a signal generating unit (113), adapted to generate the signal that the coordinated transceiver device sends to the new online opposite device according to the configured sequence generator, the initial value of the sequence generator, and the time when the signal is sent.

12. The system of claim 10, wherein the obtaining unit of the opposite device comprises:

a storing unit (111), adapted to store a certain number of signal sequences;

a sequence receiving unit (112), adapted to receive an ID of a signal sequence that is used to generate the signal and time when the signal is sent, from the coordinated transceiver device; and

a signal generating unit (113), adapted to generate the signal that the coordinated transceiver device sends to the new online opposite device according to the stored signal sequence, the ID of the signal sequence, and the time when the signal is sent.

Ansprüche

1. Verfahren zum Beseitigen von Übersprechen zwischen digitalen Teilnehmerleitungen (digital subscriber lines), DSLs, umfassend:

Benachrichtigen (101) einer existierenden Online-Gegeneinrichtung durch eine koordinierte Sender-/Empfängereinrichtung über ein zu einer neuen Online-Gegeneinrichtung gesendetes Signal;

Empfangen (102) eines Berechnungsergebnisses, das durch die existierende Online-Gegeneinrichtung erhalten wird, durch die koordinierte Sender-/Empfängereinrichtung, wobei die Berechnung auf der Grundlage eines detektierten Fehlersignals und des zur neuen Online-Gegeneinrichtung gesendeten Signals durchgeführt wird; und

Aktualisieren (103) eines Koeffizienten eines Vektor-Vorcodierers durch die koordinierte Sender-/Empfängereinrichtung auf der Grundlage des Berechnungsergebnisses; wobei das Verfahren dadurch gekennzeichnet ist, dass der Prozess des Benachrichtigens der existierenden Online-Gegeneinrichtung über das zur neuen Online-Gegeneinrichtung gesendete Signal durch die koordinierte Sender-/Empfängereinrichtung umfasst:

Senden eines Anfangswerts eines Sequenzgenerators, der verwendet wird, um das Signal und die Zeit, zu der das Signal gesendet wird, zu erzeugen, durch die koordinierte Sender-/Empfängereinrichtung zur existierenden Online-Gegeneinrichtung, wobei in der koordinierten Sender-/Empfängereinrichtung und der existierenden Online-Gegeneinrichtung jeweils Sequenzgeneratoren mit derselben Struktur konfiguriert sind; und

Erhalten des Signals durch die existierende Online-Gegeneinrichtung gemäß dem konfigurierten Sequenzgenerator, dem Anfangswert des Sequenzgenerators und der Zeit, zu der das Signal gesendet wird.

2. Verfahren zum Beseitigen von Übersprechen zwischen digitalen Teilnehmerleitungen (digital subscriber lines), DSLs, umfassend:

Benachrichtigen (101) einer existierenden Online-Gegeneinrichtung durch eine koordinierte Sender-/Empfängereinrichtung über ein zu einer neuen Online-Gegeneinrichtung gesendetes Signal;

Empfangen (102) eines Berechnungsergebnisses, das durch die existierende Online-Gegeneinrichtung erhalten wird, durch die koordinierte Sender-/Empfängereinrichtung, wobei die Berechnung auf der Grundlage eines detektierten Fehlersignals und des zur neuen Online-Gegeneinrichtung gesendeten Signals durchgeführt wird; und

Aktualisieren (103) eines Koeffizienten eines Vektor-Vorcodierers durch die koordinierte Sender-/Empfängereinrichtung auf der Grundlage des Berechnungsergebnisses; wobei das Verfahren dadurch gekennzeichnet ist, dass der Prozess des Benachrichtigens der existierenden Online-Gegeneinrichtung über das zur neuen Online-Gegeneinrichtung gesendete Signal durch die koordinierte Sender-/Empfängereinrichtung umfasst:

Senden einer ID einer Signalsequenz, die verwendet wird, um das Signal und die Zeit, zu der das Signal gesendet wird, zu erzeugen, durch die koordinierte Sender-/Empfängereinrichtung zur existierenden Online-Gegeneinrichtung, wobei in der koordinierten Sender-/Empfängereinrichtung und der existierenden Online-Gegeneinrichtung jeweils eine bestimmte Anzahl derselben Signalsequenzen vorgespeichert ist; und

Erhalten des Signals durch die existierende Online-Gegeneinrichtung gemäß den gespeicherten Signalsequenzen, der ID der Signalsequenz und der Zeit, zu der das Signal gesendet wird.

3. Verfahren nach Anspruch 1 oder 2, wobei die Berechnung auf der Grundlage des detektierten Fehlersignals und des zur neuen Online-Gegeneinrichtung gesendeten Signals umfasst: Multiplizieren einer Konjugation des zur neuen Online-Gegeneinrichtung gesendeten Signals mit dem Fehlersignal; und Akkumulieren des Produkts für eine bestimmte Zeit.

4. Verfahren nach Anspruch 3, wobei der Koeffizient des Vektor-Vorcodierers ausgelegt ist, das Übersprechen, das die neue Online-Gegeneinrichtung an der existierenden Online-Gegeneinrichtung erzeugt, zu beseitigen, und der Prozess des Aktualisierens des Koeffizienten des Vektor-Vorcodierers auf der Grundlage des Berechnungsergebnisses durch die koordinierte Sender-/Empfängereinrichtung umfasst: Subtrahieren eines Produkts des Berechnungsergebnisses und eines adaptiven Stufenfaktors vom Koeffizienten des Vektor-Vorcodierers durch die koordinierte Sender-/Empfängereinrichtung.

5. Verfahren nach Anspruch 1 oder 2, wobei die Berechnung auf der Grundlage des detektierten Fehlersignals und des zur neuen Online-Gegeneinrichtung gesendeten Signals umfasst: Multiplizieren der Konjugation des zur neuen Online-Gegeneinrichtung gesendeten Signals mit dem adaptiven Stufenfaktor und Akkumulieren des Produkts für eine bestimmte Zeit.

6. Verfahren nach Anspruch 5, wobei der Prozess des Aktualisierens des Koeffizienten des Vektor-Vorcodierers auf der Grundlage des Berechnungsergebnisses durch die koordinierte Sender-/Empfängereinrichtung umfasst: Subtrahieren des Berechnungsergebnisses vom Koeffizienten des Vektor-Vorcodierers durch die koordinierte Sender-/Empfängereinrichtung.

7. Verfahren nach Anspruch 1 oder 2, wobei das Fehlersignal detektiert wird, indem die existierende Online-Gegeneinrichtung eine empfangene Probe beurteilt, um eine Entscheidungsprobe zu erhalten, und die existierende Online-Gegeneinrichtung das Fehlersignal gemäß einer Differenz zwischen der empfangenen Probe und der Entscheidungsprobe erhält.

8. Koordinierte Sender-/Empfängereinrichtung für eine digitale Teilnehmerleitung (digital subscriber line), DSL, umfassend:

eine Benachrichtigungseinheit (21), die ausgelegt ist, eine existierende Online-Gegeneinrichtung über ein zu einer neuen Online-Gegeneinrichtung gesendetes Signal zu benachrichtigen;

eine Empfangseinheit (22), die ausgelegt ist, ein durch die existierende Online-Gegeneinrichtung zurückgemeldetes Berechnungsergebnis zu empfangen, wobei das Berechnungsergebnis durch die existierende Online-Gegeneinrichtung durch Durchführen einer Berechnung auf der Grundlage eines detektierten Fehlersignals und des zur neuen Online-Gegeneinrichtung gesendeten Signals erhalten wird; und

eine Aktualisierungseinheit (23), die ausgelegt ist, einen Koeffizienten eines Vektor-Vorcodierers gemäß dem Berechnungsergebnis zu aktualisieren;

wobei die koordinierte DSL-Sender-/Empfängereinrichtung dadurch gekennzeichnet ist, dass die Benachrichtigungseinheit (21) umfasst:

eine Speichereinheit (211), die ausgelegt ist, einen Sequenzgenerator zu speichern; und

eine Sequenz-Sendeeinheit (212), die ausgelegt ist, einen Anfangswert des Sequenzgenerators, der verwendet wird, um das Signal und die Zeit, zu der das Signal gesendet wird, zu erzeugen, zur existierenden Online-Gegeneinrichtung zu senden, um so die existierende Online-Gegeneinrichtung zu informieren, das Signal gemäß dem Anfangswert zu erhalten und die Berechnung durchzuführen.

9. Koordinierte Sender-/Empfängereinrichtung für eine digitale Teilnehmerleitung (digital subscriber line), DSL, umfassend:

eine Benachrichtigungseinheit (21), die ausgelegt ist, eine existierende Online-Gegeneinrichtung über ein zu einer neuen Online-Gegeneinrichtung gesendetes Signal zu benachrichtigen;

eine Empfangseinheit (22), die ausgelegt ist, ein durch die existierende Online-Gegeneinrichtung zurückgemeldetes Berechnungsergebnis zu empfangen, wobei das Berechnungsergebnis durch die existierende Online-Gegeneinrichtung durch Durchführen einer Berechnung auf der Grundlage eines detektierten Fehlersignals und des zur neuen Online-Gegeneinrichtung gesendeten Signals erhalten wird; und

eine Aktualisierungseinheit (23), die ausgelegt ist, einen Koeffizienten eines Vektor-Vorcodierers gemäß dem Berechnungsergebnis zu aktualisieren;

wobei die koordinierte DSL-Sender-/Empfängereinrichtung dadurch gekennzeichnet ist, dass die Benachrichtigungseinheit (21) umfasst:

eine Speichereinheit (211), die ausgelegt ist, eine bestimmte Anzahl von Signalsequenzen zu speichern; und

eine Sequenz-Sendeeinheit (212), die ausgelegt ist, eine ID einer Signalsequenz, die verwendet wird, um das Signal und die Zeit, zu der das Signal gesendet wird, zu erzeugen, zur existierenden Online-Gegeneinrichtung zu senden, um so die existierende Online-Gegeneinrichtung zu informieren, das Signal gemäß der ID zu erhalten und die Berechnung durchzuführen.

10. System zum Beseitigen von Übersprechen zwischen digitalen Teilnehmerleitungen (digital subscriber lines), DSLs, das eine koordinierte Sender-/Empfängereinrichtung (2) und eine Gegeneinrichtung (1) umfasst, wobei:

die Gegeneinrichtung umfasst: eine Erhaltungseinheit (11), die ausgelegt ist, ein Signal zu erhalten, das die koordinierte Sender-/Empfängereinrichtung zu einer neuen Online-Gegeneinrichtung sendet; eine Detektionseinheit (12), die ausgelegt ist, ein Fehlersignal zu detektieren; eine Berechnungseinheit (13), die ausgelegt ist, eine Berechnung auf der Grundlage des detektierten Fehlersignals und des erhaltenen, zur neuen Online-Gegeneinrichtung gesendeten Signals durchzuführen; und eine Rückmeldeeinheit (14), die ausgelegt ist, ein Berechnungsergebnis der Berechnungseinheit an die koordinierte Sender-/Empfängereinrichtung zurückzumelden; und

wobei das System dadurch gekennzeichnet ist, dass:

die koordinierte Sender-/Empfängereinrichtung eine koordinierte DSL-Sender-/Empfängereinrichtung nach Anspruch 8 oder 9 ist.

11. System nach Anspruch 10, wobei die Erhaltungseinheit der Gegeneinrichtung umfasst:

eine Speichereinheit (111), die ausgelegt ist, einen Sequenzgenerator zu speichern;

eine Sequenzempfangseinheit (112), die ausgelegt ist, einen Anfangswert des Sequenzgenerators, der das zur neuen Online-Gegeneinrichtung gesendete Signal und die Zeit, zu der das Signal gesendet wird, erzeugt, von der koordinierten Sender-/Empfängereinrichtung zu empfangen; und

eine Signalerzeugungseinheit (113), die ausgelegt ist, das Signal, das die koordinierte Sender-/Empfängereinrichtung zur neuen Online-Gegeneinrichtung sendet, gemäß dem konfigurierten Sequenzgenerator, dem Anfangswert des Sequenzgenerators und der Zeit, zu der das Signal gesendet wird, zu erzeugen.

12. System nach Anspruch 10, wobei die Erhaltungseinheit der Gegeneinrichtung umfasst:

eine Speichereinheit (111), die ausgelegt ist, eine bestimmte Anzahl von Signalsequenzen zu speichern;

eine Sequenzempfangseinheit (112), die ausgelegt ist, eine ID einer Signalsequenz, die verwendet wird, um das Signal und die Zeit, zu der das Signal gesendet wird, zu erzeugen, von der koordinierten Sender-/Empfängereinrichtung zu empfangen; und

eine Signalerzeugungseinheit (113), die ausgelegt ist, das Signal, das die koordinierte Sender-/Empfängereinrichtung zur neuen Online-Gegeneinrichtung sendet, gemäß der gespeicherten Signalsequenz, der ID der Signalsequenz und der Zeit, zu der das Signal gesendet wird, zu erzeugen.

Revendications

1. Procédé d'élimination de la diaphonie entre des lignes d'abonné numériques (digital subscriber lines), DSL, comprenant:

la notification (101), par un dispositif émetteur-récepteur coordonné, à un dispositif opposé en ligne existant d'un signal envoyé à un nouveau dispositif opposé en ligne;

la réception (102), par le dispositif émetteur-récepteur coordonné, d'un résultat de calcul qui est obtenu par le dispositif opposé en ligne existant, le calcul étant effectué en fonction d'un signal d'erreur détecté et du signal envoyé au nouveau dispositif opposé en ligne; et

l'actualisation (103), par le dispositif émetteur-récepteur coordonné, d'un coefficient d'un précodeur vectoriel en fonction du résultat de calcul; le procédé étant caractérisé en ce que le processus de notification au dispositif opposé en ligne existant du signal envoyé au nouveau dispositif opposé en ligne par le dispositif émetteur-récepteur coordonné comprend:

l'envoi, par le dispositif émetteur-récepteur coordonné, d'une valeur initiale d'un générateur de séquences utilisé pour générer le signal et l'heure d'envoi du signal, au dispositif opposé en ligne existant, des générateurs de séquences ayant la même structure étant respectivement configurés dans le dispositif émetteur-récepteur coordonné et le dispositif opposé en ligne existant; et

l'obtention, par le dispositif opposé en ligne existant, du signal en fonction du générateur de séquences configuré, de la valeur initiale du générateur de séquences, et de l'heure d'envoi du signal.

2. Procédé d'élimination de la diaphonie entre des lignes d'abonné numériques (digital subscriber lines), DSL, comprenant:

la notification (101), par un dispositif émetteur-récepteur coordonné, à un dispositif opposé en ligne existant d'un signal envoyé à un nouveau dispositif opposé en ligne;

la réception (102), par le dispositif émetteur-récepteur coordonné, d'un résultat de calcul qui est obtenu par le dispositif opposé en ligne existant, le calcul étant effectué en fonction d'un signal d'erreur détecté et du signal envoyé au nouveau dispositif opposé en ligne; et

l'actualisation (103), par le dispositif émetteur-récepteur coordonné, d'un coefficient d'un précodeur vectoriel en fonction du résultat de calcul; le procédé étant caractérisé en ce que le processus de notification du dispositif opposé en ligne existant du signal envoyé au nouveau dispositif opposé en ligne par le dispositif émetteur-récepteur coordonné comprend:

l'envoi, par le dispositif émetteur-récepteur coordonné, d'un ID d'une séquence de signal qui est utilisé pour générer le signal et l'heure d'envoi du signal, au dispositif opposé en ligne existant, un certain nombre des mêmes séquences de signal étant respectivement prémémorisées dans le dispositif émetteur-récepteur coordonné et le dispositif opposé en ligne existant; et

l'obtention, par le dispositif opposé en ligne existant, du signal en fonction des séquences de signal mémorisées, de l'ID de la séquence de signal, et de l'heure d'envoi du signal.

3. Procédé selon la revendication 1 ou 2, dans lequel le calcul en fonction du signal d'erreur détecté et du signal envoyé au nouveau dispositif opposé en ligne comprend: la multiplication d'une conjugaison du signal envoyé au nouveau dispositif opposé en ligne par le signal d'erreur; et l'accumulation du produit pendant un certain temps.

4. Procédé selon la revendication 3, dans lequel le coefficient du précodeur vectoriel est adapté pour éliminer la diaphonie que génère le nouveau dispositif opposé en ligne sur le dispositif opposé en ligne existant, et le processus d'actualisation du coefficient du précodeur vectoriel en fonction du résultat de calcul par le dispositif émetteur-récepteur coordonné comprend: la soustraction, par le dispositif émetteur-récepteur coordonné, d'un produit du résultat de calcul et d'un facteur de pas adaptatif du coefficient du précodeur vectoriel.

5. Procédé selon la revendication 1 ou 2, dans lequel le calcul basé sur le signal d'erreur détecté et le signal envoyé au nouveau dispositif opposé en ligne comprend: la multiplication de la conjugaison du signal envoyé au nouveau dispositif opposé en ligne par le facteur de pas adaptatif, et l'accumulation du produit pendant un certain temps.

6. Procédé selon la revendication 5, dans lequel le processus d'actualisation du coefficient du précodeur vectoriel en fonction du résultat de calcul par le dispositif émetteur-récepteur coordonné comprend: la soustraction, par le dispositif émetteur-récepteur coordonné, du résultat de calcul du coefficient du précodeur vectoriel.

7. Procédé selon la revendication 1 ou 2, dans lequel le signal d'erreur est détecté par l'évaluation, par le dispositif opposé en ligne existant, d'un échantillon reçu afin d'obtenir un échantillon de décision, et l'obtention, par le dispositif opposé en ligne existant, du signal d'erreur en fonction d'une différence entre l'échantillon reçu et l'échantillon de décision.

8. Dispositif émetteur-récepteur coordonné de ligne d'abonné numérique (digital subscriber line), DSL, comprenant:

une unité de notification (21), adaptée pour notifier à un dispositif opposé en ligne existant un signal envoyé à un nouveau dispositif opposé en ligne;

une unité de réception (22), adaptée pour recevoir un résultat de calcul renvoyé par le dispositif opposé en ligne existant, le résultat de calcul étant obtenu par le dispositif opposé en ligne existant en effectuant un calcul en fonction d'un signal d'erreur détecté et du signal envoyé au nouveau dispositif opposé en ligne; et

une unité d'actualisation (23), adaptée pour actualiser un coefficient d'un précodeur vectoriel en fonction du résultat de calcul;

le dispositif émetteur-récepteur coordonné DSL étant caractérisé en ce que l'unité de notification (21) comprend:

une unité de mémorisation (211), adaptée pour mémoriser un générateur de séquences; et

une unité d'envoi de séquence (212), adaptée pour envoyer une valeur initiale du générateur de séquences utilisé pour générer le signal et l'heure d'envoi du signal, au dispositif opposé en ligne existant, de façon à informer le dispositif opposé en ligne existant afin d'obtenir le signal en fonction de la valeur initiale et d'effectuer le calcul.

9. Dispositif émetteur-récepteur coordonné de ligne d'abonné numérique (digital subscriber line), DSL, comprenant:

une unité de notification (21), adaptée pour notifier à un dispositif opposé en ligne existant un signal envoyé à un nouveau dispositif opposé en ligne;

une unité de réception (22), adaptée pour recevoir un résultat de calcul renvoyé par le dispositif opposé en ligne existant, le résultat de calcul étant obtenu par le dispositif opposé en ligne existant en effectuant un calcul en fonction d'un signal d'erreur détecté et du signal envoyé au nouveau dispositif opposé en ligne; et

une unité d'actualisation (23), adaptée pour actualiser un coefficient d'un précodeur vectoriel en fonction du résultat de calcul;

le dispositif émetteur-récepteur coordonné DSL étant caractérisé en ce que l'unité de notification (21) comprend:

une unité de mémorisation (211), adaptée pour mémoriser un certain nombre de séquences de signal; et

une unité d'envoi de séquence (212), adaptée pour envoyer un ID d'une séquence de signal qui est utilisé pour générer le signal et l'heure d'envoi du signal, au dispositif opposé en ligne existant, de façon à informer le dispositif opposé en ligne existant d'obtenir le signal en fonction de l'ID et d'effectuer le calcul.

10. Système d'élimination de diaphonie entre des lignes d'abonné numériques (digital subscriber lines), DSL, comprenant un dispositif émetteur-récepteur coordonné (2) et un dispositif opposé (1), dans lequel:

le dispositif opposé comprend: une unité d'obtention (11), adapté pour obtenir un signal que le dispositif émetteur-récepteur coordonné envoie à un nouveau dispositif opposé en ligne; une unité de détection (12), adaptée pour détecter un signal d'erreur; une unité de calcul (13), adaptée pour effectuer un calcul en fonction du signal d'erreur détecté et du signal obtenu envoyé au nouveau dispositif opposé en ligne; et une unité de retour d'informations (14), adaptée pour renvoyer un résultat de calcul de l'unité de calcul au dispositif émetteur-récepteur coordonné; et

le système étant caractérisé en ce que:

le dispositif émetteur-récepteur coordonné est un dispositif émetteur-récepteur coordonné DSL selon la revendication 8 ou 9.

11. Système selon la revendication 10, dans lequel l'unité d'obtention du dispositif opposé comprend:

une unité de mémorisation (111), adaptée pour mémoriser un générateur de séquences;

une unité de réception de séquence (112), adaptée pour recevoir une valeur initiale du générateur de séquences qui génère le signal envoyé au nouveau dispositif opposé en ligne et l'heure d'envoi du signal, du dispositif émetteur-récepteur coordonné; et

une unité de génération de signaux (113), adaptée pour générer le signal que le dispositif émetteur-récepteur coordonné envoie au nouveau dispositif opposé en ligne en fonction du générateur de séquences configuré, de la valeur initiale du générateur de séquences et de l'heure d'envoi du signal.

12. Système selon la revendication 10, dans lequel l'unité d'obtention du dispositif opposé comprend:

une unité de mémorisation (111), adaptée pour mémoriser un certain nombre de séquences de signal;

une unité de réception de séquence (112), adaptée pour recevoir un ID d'une séquence de signal qui est utilisée pour générer le signal et l'heure d'envoi du signal, du dispositif émetteur-récepteur coordonné; et

une unité de génération de signaux (113), adaptée pour générer le signal que le dispositif émetteur-récepteur coordonné envoie au nouveau dispositif opposé en ligne en fonction de la séquence de signal mémorisée, de l'ID de la séquence de signal et de l'heure d'envoi du signal.

Drawing